{"answers":{"affected":"3 open source packages ship an affected version, including twisted. It affects 5 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-21716 exists.","fix":"Upgrade twisted to 22.2.0 or later.","what":"CVE-2022-21716 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 3 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2022-21716 and fix it if it is affected.\n\nWhat it is: CVE-2022-21716 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 3 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-21716 exists.\n\nAffected packages and fixed versions:\n- twisted (PyPI): affected from 21.7.0; fixed in 22.2.0\n- twisted (PyPI): affected from 21.7.0; fixed in 22.2.0\n- twisted (PyPI): affected from 21.7.0; fixed in 22.2.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2022-21716/ (Markdown: https://insights.sbomify.com/CVE-2022-21716/index.md)","id":"CVE-2022-21716","markdown":"https://insights.sbomify.com/CVE-2022-21716/index.md","name":"CVE-2022-21716","record":{"aliases":["DEBIAN-CVE-2022-21716","DLA-2938-1","GHSA-rv6r-3f5q-9rgx","PYSEC-2022-160","SUSE-SU-2022:2070-1","SUSE-SU-2022:2117-1","SUSE-SU-2022:2297-1","UBUNTU-CVE-2022-21716","USN-5354-2"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Twisted Python framework","requires_auth":"none","summary":"An attacker can cause a denial of service by sending excessive data to the SSH version identifier, exhausting memory in the Twisted framework.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"http_server","vendor":"oracle"},{"product":"zfs_storage_appliance_kit","vendor":"oracle"},{"product":"twisted","vendor":"twisted"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 22.2.0, Twisted SSH client and server implement is able to accept an infinite amount of data for the peer's SSH version identifier. This ends up with a buffer using all the available memory. The attach is a simple as `nc -rv localhost 22 \u003c /dev/zero`. A patch is available in version 22.2.0. There are currently no known workarounds.","ecosystems":["PyPI","SUSE:Enterprise Storage 7","SUSE:HPE Helion OpenStack 8","SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS","SUSE:Linux Enterprise Module for Package Hub 15 SP3","SUSE:Linux Enterprise Module for Server Applications 15 SP3","SUSE:Linux Enterprise Module for Server Applications 15 SP4","SUSE:Linux Enterprise Module for Web and Scripting 12","SUSE:Linux Enterprise Server 15 SP2-BCL","SUSE:Linux Enterprise Server 15 SP2-LTSS","SUSE:Linux Enterprise Server for SAP Applications 15 SP2","SUSE:Manager Proxy 4.1","SUSE:Manager Retail Branch Server 4.1","SUSE:Manager Server 4.1","SUSE:OpenStack Cloud 8","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.3","openSUSE:Leap 15.4"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Buffer Overflow in Twisted","id":"CVE-2022-21716","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","oracle:http_server","oracle:zfs_storage_appliance_kit"],"type":"denial_of_service","year":"2022"},"n_packages":24,"n_references":9,"next":{"headline":"Renderers can obtain access to random bluetooth device without permission in Electron","id":"CVE-2022-21718"},"packages":[{"ecosystem":"PyPI","fixed":["22.2.0"],"introduced":["21.7.0"],"last_affected":[],"package":"twisted","purl":null,"source":"GHSA-rv6r-3f5q-9rgx"},{"ecosystem":"PyPI","fixed":["22.2.0"],"introduced":["21.7.0"],"last_affected":[],"package":"twisted","purl":"pkg:pypi/twisted","source":"GHSA-rv6r-3f5q-9rgx"},{"ecosystem":"PyPI","fixed":["22.2.0"],"introduced":["21.7.0"],"last_affected":[],"package":"twisted","purl":"pkg:pypi/twisted","source":"PYSEC-2022-160"},{"ecosystem":"SUSE:Enterprise Storage 7","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Enterprise%20Storage%207","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:HPE Helion OpenStack 8","fixed":["15.2.1-9.17.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=HPE%20Helion%20OpenStack%208","source":"SUSE-SU-2022:2117-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOS","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Package Hub 15 SP3","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP3","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP3","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP3","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP4","fixed":["22.2.0-150400.5.4.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP4","source":"SUSE-SU-2022:2297-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Web and Scripting 12","fixed":["15.2.1-9.17.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2012","source":"SUSE-SU-2022:2117-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP2-BCL","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCL","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP2-LTSS","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP2","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Manager Proxy 4.1","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Manager%20Proxy%204.1","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Manager Retail Branch Server 4.1","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:Manager Server 4.1","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20Manager%20Server%204.1","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"SUSE:OpenStack Cloud 8","fixed":["15.2.1-9.17.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20OpenStack%20Cloud%208","source":"SUSE-SU-2022:2117-1"},{"ecosystem":"SUSE:OpenStack Cloud 9","fixed":["15.2.1-9.17.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20OpenStack%20Cloud%209","source":"SUSE-SU-2022:2117-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 8","fixed":["15.2.1-9.17.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%208","source":"SUSE-SU-2022:2117-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["15.2.1-9.17.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/suse/python-Twisted\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2022:2117-1"},{"ecosystem":"openSUSE:Leap 15.3","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/opensuse/python-Twisted\u0026distro=openSUSE%20Leap%2015.3","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"openSUSE:Leap 15.4","fixed":["19.10.0-150200.3.12.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/opensuse/python-Twisted\u0026distro=openSUSE%20Leap%2015.4","source":"SUSE-SU-2022:2070-1"},{"ecosystem":"openSUSE:Leap 15.4","fixed":["22.2.0-150400.5.4.1"],"introduced":["0"],"last_affected":[],"package":"python-Twisted","purl":"pkg:rpm/opensuse/python-Twisted\u0026distro=openSUSE%20Leap%2015.4","source":"SUSE-SU-2022:2297-1"}],"prev":{"headline":"Cross-site Scripting Vulnerability in CodeIgniter4","id":"CVE-2022-21715"},"products":["twisted"],"published":"2022-03-03","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-22","vendors":["twisted"]},"summary":"An attacker can cause a denial of service by sending excessive data to the SSH version identifier, exhausting memory in the Twisted framework.","url":"https://insights.sbomify.com/CVE-2022-21716/"}